def testRegexFirstGroupMatch(self):
s = 'oXooXoooXoX'
self.assertEqual((1, 3), libc.regex_first_group_match('(X.)', s, 0))
# Match from position 3
self.assertEqual((4, 6), libc.regex_first_group_match('(X.)', s, 3))
# Match from position 3
self.assertEqual((8, 10), libc.regex_first_group_match('(X.)', s, 6))
def testRegexFirstGroupMatch(self):
s = 'oXooXoooXoX'
self.assertEqual((1, 3), libc.regex_first_group_match('(X.)', s, 0))
# Match from position 3
self.assertEqual((4, 6), libc.regex_first_group_match('(X.)', s, 3))
# Match from position 3
self.assertEqual((8, 10), libc.regex_first_group_match('(X.)', s, 6))
# Syntax Error
self.assertRaises(RuntimeError, libc.regex_first_group_match, r'*',
'abcd', 0)
def Replace(self, s, op):
# type: (str, suffix_op__PatSub) -> str
regex = '(%s)' % self.regex # make it a group
if op.replace_mode == Id.Lit_Slash:
try:
return _PatSubAll(s, regex,
self.replace_str) # loop over matches
except RuntimeError as e:
# libc.regex_first_group_match raises RuntimeError.
# note: MyPy doesn't know RuntimeError has e.message (and e.args)
msg = e.message # type: str
e_die('Error matching regex %r: %s',
regex,
msg,
span_id=self.slash_spid)
if op.replace_mode == Id.Lit_Pound:
regex = '^' + regex
elif op.replace_mode == Id.Lit_Percent:
regex = regex + '$'
m = libc.regex_first_group_match(regex, s, 0)
#log('regex = %r, s = %r, match = %r', regex, s, m)
if m is None:
return s
start, end = m
return s[:start] + self.replace_str + s[end:]
def testSpecialCharsInCharClass(self):
CASES = [
("([a-z]+)", '123abc123', (3, 6)),
# Uh what the heck, \- means the same thing as -? It's just ignored. At
# least in GNU libc.
# https://stackoverflow.com/questions/28495913/how-do-you-escape-a-hyphen-as-character-range-in-a-posix-regex
# The <hyphen> character shall be treated as itself if it occurs first (after an initial '^', if any) or last in the list, or as an ending range point in a range expression
("([a\-z]+)", '123abc123', (3, 6)),
# This is an inverted range. TODO: Need to fix the error message.
#("([a\-.]+)", '123abc123', None),
("([\\\\]+)", 'a\\b', (1, 2)),
# Can you escape ] with \? Yes in fnmatch, but NO here!!!
('([\\]])', '\\', None),
('([\\]])', ']', None),
# Weird parsing!!!
('([\\]])', '\\]', (0, 2)),
]
for pat, s, expected in CASES:
result = libc.regex_first_group_match(pat, s, 0)
self.assertEqual(
expected, result,
"FAILED: pat %r s %r result %s" % (pat, s, result))
def _AllMatchPositions(s, regex):
"""Returns a list of all (start, end) match positions of the regex against s.
(If there are no matches, it returns the empty list.)
"""
matches = []
pos = 0
n = len(s)
while pos < n: # needed to prevent infinite loop in (.*) case
m = libc.regex_first_group_match(regex, s, pos)
if m is None:
break
matches.append(m)
start, end = m
pos = end # advance position
return matches
def _AllMatchPositions(s, regex):
"""Returns a list of all (start, end) match positions of the regex against s.
(If there are no matches, it returns the empty list.)
"""
matches = []
pos = 0
while True:
m = libc.regex_first_group_match(regex, s, pos)
if m is None:
break
matches.append(m)
start, end = m
#log('m = %r, %r' % (start, end))
pos = end # advance position
return matches
def Replace(self, s, op):
regex = '(%s)' % self.regex # make it a group
if op.do_all:
return _PatSubAll(s, regex, self.replace_str) # loop over matches
if op.do_prefix:
regex = '^' + regex
elif op.do_suffix:
regex = regex + '$'
m = libc.regex_first_group_match(regex, s, 0)
#log('regex = %r, s = %r, match = %r', regex, s, m)
if m is None:
return s
start, end = m
return s[:start] + self.replace_str + s[end:]
def PatSub(s, op, pat, replace_str):
"""Helper for ${x/pat/replace}."""
#log('PAT %r REPLACE %r', pat, replace_str)
regex, err = glob_.GlobToExtendedRegex(pat)
if err:
e_die("Can't convert glob to regex: %r", pat)
if regex is None: # Simple/fast path for fixed strings
if op.do_all:
return s.replace(pat, replace_str)
elif op.do_prefix:
if s.startswith(pat):
n = len(pat)
return replace_str + s[n:]
else:
return s
elif op.do_suffix:
if s.endswith(pat):
n = len(pat)
return s[:-n] + replace_str
else:
return s
else:
return s.replace(pat, replace_str, 1) # just the first one
else:
regex = '(%s)' % regex # make it a group
if op.do_all:
return _PatSubAll(s, regex, replace_str) # loop over matches
if op.do_prefix:
regex = '^' + regex
elif op.do_suffix:
regex = regex + '$'
m = libc.regex_first_group_match(regex, s, 0)
log('regex = %r, s = %r, match = %r', regex, s, m)
if m is None:
return s
start, end = m
return s[:start] + replace_str + s[end:]
def Replace(self, s, op):
regex = '(%s)' % self.regex # make it a group
if op.replace_mode == Id.Lit_Slash:
try:
return _PatSubAll(s, regex, self.replace_str) # loop over matches
except RuntimeError as e:
e_die('Error matching regex %r: %s', regex, e, span_id=self.slash_spid)
if op.replace_mode == Id.Lit_Pound:
regex = '^' + regex
elif op.replace_mode == Id.Lit_Percent:
regex = regex + '$'
m = libc.regex_first_group_match(regex, s, 0)
#log('regex = %r, s = %r, match = %r', regex, s, m)
if m is None:
return s
start, end = m
return s[:start] + self.replace_str + s[end:]
def testRegexFirstGroupMatchError(self):
# Helping to debug issue #291
s = ''
if 0:
libc.regex_first_group_match("(['+-'])", s, 6)